/* The interface does not animate to entertain. Transitions exist only where
   they explain a change of state, and they are short. No bounce, no spring,
   no entrance animation, no skeleton shimmer. */
:root{
  --os-duration-fast:120ms;
  --os-duration:180ms;
  --os-ease:cubic-bezier(0.2,0,0.2,1);
}